package com.star.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.star.constant.MessageConstant;
import com.star.dto.UserLoginDTO;
import com.star.entity.User;
import com.star.exception.LoginFailedException;
import com.star.mapper.UserMapper;
import com.star.properties.WeChatProperties;
import com.star.service.UserService;
import com.star.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信服务接口地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
private WeChatProperties weChatProperties;
@Autowired
private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
       String openid=getOpenid(userLoginDTO.getCode());

       log.info("openid:{}", openid);
        //判断openid是否为空,如果为空表示登录失败,抛出业务异常
        if(openid==null)
        {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user=userMapper.getByOpenid(openid);

        //如果是新用户,自动完成注册
        if(user==null){
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回这个用户对象



return user;
}

    /**
     * 调用微信接口服务,获得当前微信用户的openid
     * @param code
     * @return
     */
    private String getOpenid(String code){
    Map<String, String> map=new HashMap<>();
    map.put("appid",weChatProperties.getAppid());
    map.put("secret",weChatProperties.getSecret());
    map.put("grant_type","authorization_code");
    map.put("js_code",code);
    String json=HttpClientUtil.doGet(WX_LOGIN,map);
    JSONObject jsonObject= JSON.parseObject(json);
    String openid=jsonObject.getString("openid");
    return openid;
}
}
